class_docstr: A gray background with white gridlines.
  
  This is the default theme
  
  Parameters
  ----------
  base_size : int
      Base font size. All text sizes are a scaled versions of
      the base font size.
  base_family : str
      Base font family. If `None`, use [](`plotnine.options.base_family`).
code: def __init__(self, base_size=11, base_family=None):
      base_family = base_family or get_option("base_family")
      quarter_line = base_size / 4
      fifth_line = base_size / 5
      eigth_line = base_size / 8
      m = get_option("base_margin")
  
      super().__init__(
          line=element_line(
              color="black", size=1, linetype="solid", lineend="butt"
          ),
          rect=element_rect(
              fill="white", color="black", size=1, linetype="solid"
          ),
          text=element_text(
              family=base_family,
              style="normal",
              color="black",
              size=base_size,
              linespacing=0.9,
              ha="center",
              va="center",
              rotation=0,
              margin={},
          ),
          aspect_ratio=get_option("aspect_ratio"),
          axis_line=element_line(),
          axis_line_x=element_blank(),
          axis_line_y=element_blank(),
          axis_text=element_text(size=base_size * 0.8, color="#4D4D4D"),
          axis_text_x=element_text(va="top", margin={"t": fifth_line}),
          axis_text_y=element_text(
              ha="right", margin={"r": fifth_line}
          ),
          axis_ticks=element_line(color="#333333"),
          axis_ticks_direction="out",
          axis_ticks_length=0,
          axis_ticks_length_major=quarter_line,
          axis_ticks_length_minor=eigth_line,
          axis_ticks_minor=element_blank(),
          axis_ticks_pad=2,
          axis_title_x=element_text(
              va="bottom", ha="center", margin={"t": m, "units": "fig"}
          ),
          axis_title_y=element_text(
              angle=90,
              va="center",
              ha="left",
              margin={"r": m, "units": "fig"},
          ),
          dpi=get_option("dpi"),
          figure_size=get_option("figure_size"),
          # legend, None values are for parameters where the
          # drawing routines can make better decisions than
          # can be pre-determined in the theme.
          legend_background=element_rect(color="None"),
          legend_box="auto",
          legend_box_just="auto",
          legend_box_margin=0,  # points
          legend_box_spacing=m * 3,  # figure units
          legend_direction="auto",
          legend_entry_spacing_x=5,
          legend_entry_spacing_y=2,
          legend_key=element_rect(fill="#F2F2F2", colour="None"),
          legend_key_height=None,
          legend_key_size=base_size * 0.8 * 1.8,
          legend_key_width=None,
          legend_margin=0,  # points
          legend_position="right",
          legend_spacing=10,  # points
          legend_text=element_text(
              size=base_size * 0.8,
              ha="left",
              margin={"t": 3, "b": 3, "l": 3, "r": 3, "units": "pt"},
          ),
          legend_text_colorbar=element_text(va="center"),
          legend_text_legend=element_text(va="baseline"),
          legend_title=element_text(
              ha="left",
              margin={
                  "t": m,
                  "b": m,
                  "l": m,
                  "r": m,
                  "units": "fig",
              },
          ),
          legend_title_align="auto",
          panel_background=element_rect(fill="#EBEBEB"),
          panel_border=element_blank(),
          panel_grid_major=element_line(color="white", size=1),
          panel_grid_minor=element_line(color="white", size=0.5),
          panel_spacing=m,
          panel_spacing_x=None,
          panel_spacing_y=None,
          plot_background=element_rect(color="white"),
          plot_caption=element_text(
              size=base_size * 0.8,
              ha="right",
              va="bottom",
              ma="left",
              margin={"t": m, "units": "fig"},
          ),
          plot_margin=m,
          plot_subtitle=element_text(
              ha="left",
              va="top",
              ma="left",
              margin={"b": m, "units": "fig"},
          ),
          plot_title=element_text(
              size=base_size * 1.2,
              ha="left",
              va="top",
              ma="left",
              margin={"b": m, "units": "fig"},
          ),
          strip_align=0,
          strip_align_x=None,
          strip_align_y=None,
          strip_background=element_rect(color="None", fill="#D9D9D9"),
          strip_background_x=element_rect(width=1),
          strip_background_y=element_rect(height=1),
          strip_text=element_text(
              color="#1A1A1A",
              size=base_size * 0.8,
              linespacing=1.0,
              margin={
                  "t": 1 / 3,
                  "b": 1 / 3,
                  "l": 1 / 3,
                  "r": 1 / 3,
                  "units": "lines",
              },
          ),
          strip_text_x=None,
          strip_text_y=element_text(rotation=-90),
          complete=True,
      )
  
file_path: plotnine/plotnine/themes/theme_gray.py
imports: from .._utils.registry import alias
  from ..options import get_option
  from .elements import element_blank, element_line, element_rect, element_text
  from .theme import theme
label_desc: Use image node_id 1 to create a new theme_gray object from inherited base classes: theme with example: obj = theme_gray(base_size, base_family)